Esta bueno. Very good, probably right on target.

Although it's always hard to guess right with transliterations-and-elisions, since so many renditions sound plausible. I always thought that The Lone Ranger's faithful Indian companion Tonto (Spanish for "blockhead, dunce, fool, half-wit, oaf, simpleton," and a few other derogatory things, according to SpanishDict.com) 's stock phrase Kemo Sabe was derived from the Spanish "Quien sabe?" meaning "Who knows?" All of which we've talked about before.

(I think I recall Clayton Moore, or maybe Jay Silverheels (early Lone Ranger/Tonto actors) giving other explanations about the origin.)